Crack and Corrosion Monitoring of Pipelines Using Multi-Sensors
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5th International Scientific Conference on Applied Sciences and Engineering 29-30 December, 2015 Flora Grand Hotel, Dubai, United Arab Emirates
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Ca Hydraulic transient is a factor to be considered during structural design of water conveyance system. The most common hazardous situation is the uncontrolled pump trip due to power failure. Therefore, surge analysis is important for a water delivery project having long pipeline. Customized software WH 2.7 is used to solve the problem of surge in pipeline. Method of characteristics is widely used mathematical scheme for solving the phenomenon because of higher accuracy. The partial differential equations may be transformed by the method of characteristics into total differential equations. The later equations may then be integrated to yield finite differential equations which are conveniently handled numerically. This paper describes the problem of water hammer in long pipeline of lift irrigation scheme. The pumping station of lift irrigation scheme is located on riverbank and is to lift the water to the reservoir located at distance of 5.5 km through 1300mm diameter and 11 8 mm thickness mild steel pipeline. Three vertical turbine pumps each having capacity of delivering 0.937 m3 s total discharge capacity 2.8 m3 s and 43.24 m total head to irrigate the command area of 3300 ha. Continuous number of trials led to select combination of one air vessel of capacity 50 m3 and 10 Air Valves. Studies carried out helped to foresee advent conditions like column separation well in advance before implementation. This way it helps to finalize piping system incorporating anti surge devices like air vessel and air valves to keep the pipeline safe from water hammer due to power failure to the pumps and hence reliable operation for long run. Tomesh Kumar Sahu | Ashwini Bhoi | Kishor U. Farande "Water Hammer Analysis in Long Pipelines" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-7 | Issue-4, August 2023, URL: https://www.ijtsrd.com/papers/ijtsrd59823.pdf Paper Url:https://www.ijtsrd.com/other-scientific-research-area/other/59823/water-hammer-analysis-in-long-pipelines/tomesh-kumar-sahu
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tensile axis at an angle of 0o
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and 90o
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Determination of Range of Splash of Testing Fluid during Hydro Testing of Kni...
There are certain trivial experimental findings which may not have a major significance but their execution is considered to be of such a nature as to complete the study in the specified area. Likewise in the field of hydro testing of valves and flow equipment, there is a basic requirement of operation of the same under influence of applied hydro pressure. This is required to determine the performance parameters like the thrust and the torque required to operate the equipment. While doing so, in addition to the qualitative requirements, an additional requirement of space has to be considered to ensure the surrounding area is not affected due to splashes of the testing fluid while under pressure. This paper shall consider such a case for hydro testing of a knife gate valve. At a given pressure, when the door or gate of the valve is initiated to open, there is an initial splash of testing fluid which ejects out of the orifice created due to the opening. The horizontal range of this splash shall be mathematically determined. An experimental finding shall then be presented to confirm the derived formulae. A conclusion shall be drawn thereafter dictating the percentage error and the employability of the derived formulae. Gourav Vivek Kulkarni "Determination of Range of Splash of Testing Fluid during Hydro Testing of Knife Gate Valve" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-6 , October 2020, URL: https://www.ijtsrd.com/papers/ijtsrd35747.pdf Paper Url: https://www.ijtsrd.com/engineering/mechanical-engineering/35747/determination-of-range-of-splash-of-testing-fluid-during-hydro-testing-of-knife-gate-valve/gourav-vivek-kulkarni
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for the present study are 1.6, 1.8, 2.2, and 2.5. Experiments were conducted for nozzle pressure ratio (NPR)
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are very effective and are able to raise the base pressure value to a considerable level under the influence of
favorable pressure gradient except at lower NPR 3. At NPRs 5 and 7 for some cases the trends differ due to the
level of expansion, nature of waves present in the base region, relief available to the flow, L/D ratio of the
enlarged duct and the Mach numbers. It is seen that most of the cases exhibit similar behavior for the L/Ds in
the range 4 and 3, which means; that the back pressure has not adversely influenced the flow field in the base
region as well as in the duct. The minimum duct length required for the flow to be attached is L/D = 2, even
though in some cases flow is attached with duct wall. With this it can be stated that the micro jets can be an
alternative for the for base pressure control.
Pipeline Monitoring Using Vibroacoustic Sensing – A Review
This document reviews pipeline monitoring using vibroacoustic sensing. It discusses how vibroacoustic sensing uses acoustic and vibration sensors along pipelines to detect leaks, impacts, and other issues. A network of these sensors records signals that can identify locations of problems. The document outlines testing procedures used to simulate various events and evaluate the monitoring system's performance at detecting things like leaks, pig tracking, and impacts at different pressures and distances. It also reviews existing pipeline monitoring methods and the proposed use of acoustic waves to remotely monitor pipeline health by detecting abnormal wave propagation patterns from issues like leaks.
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3rd International Scientific Conference on Applied
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Lebua Hotels and Resorts, 1055 Silom Road, Bangrak, Bangkok
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Assessment of Fatigue Failure in FPSO Mooring Systems
Mooring lines failures are a critical subject in FPSO designs, analysis, and operations. This study aims to achieve this by extending damage calculations results from rain flow analysis to the computation of an appropriate range of Weibull parameter h. The Weibull method is a fatigue analysis method that is done in the frequency domain. Selection of a particular h parameter that will accurately compute damage is a difficult challenge. So, damage calculations can overestimate or underestimate the fatigue damage and fatigue life of mooring lines. Analysis was also carried out in the frequency domain using Dirlik’s method and the results from the two domains compared. Metocean Data for the Gulf of Guinea was obtained and inputted into Orcaflex for analysis. 12 wave classes, current and wind data were extracted and included in a computer model of the FPSO. Rain flow analysis was carried out and the results for all 12 mooring lines in the 12 different wave classes were extracted for analysis. Results from here showed all stresses were within the acceptable limits specified in DNV OS E301 guidelines. Initial analysis was carried out for all 12 wave classes considering Low Frequency LF forces alone and another carried out considering Wave Frequency WF forces alone for 3 wave classes. The 3 classes selected were in line with DNV Ultimate Limit State ULS conditions. Back calculation was used from the fatigue damage results obtained from the analysis and applied to the Weibull equation so an appropriate h parameter can be gotten. Results obtained can be applied to the fatigue analysis of mooring lines within the Gulf of Guinea environment. Adebanjo Victor Abiola | Ibiba Douglas | Matthew N. O.Sadiku | Uwakwe C. Chukwu | Inegiyemiema Morrisson | Onuh Chukwuka Humphery "Assessment of Fatigue Failure in FPSO Mooring Systems" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-6 | Issue-6 , October 2022, URL: https://www.ijtsrd.com/papers/ijtsrd52155.pdf Paper URL: https://www.ijtsrd.com/engineering/other/52155/assessment-of-fatigue-failure-in-fpso-mooring-systems/adebanjo-victor-abiola
03 8 jun17 4apr 16176 chem by prod ijeecs(edit)
Chemical by product diagnostic technique is an efficient, cost-effective and reliable diagnostic technique for gas insulate switchgear condition monitoring in view of its high sensitivity and anti- internal and external electromagnetic interference and noise. In this research paper, coaxial simulated gas insulated switchgear chamber and four different types of artificial defect were designed to cause partial discharge that will simulate the decomposition of sulphur hexafluoride gas in the chamber when energize. Fourier transform infrared spectrometer was used as the method of chemical by-product technique to detect the SF6 decomposition product and its concentration. Different numerous by-products were detected (SO2, SOF2, SO2F2, SO2F10, SiF4, CO, C3F8, C2F6 ) under this experiment using four different types of defect and the by-products differs with the type of defect and the generation rate. Gas insulated switchgear health condition can be feasibly diagnosed by analyzing the decomposition products of SF6 to identify its fault.
Io3314601465
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Analysis of stress concentration at opening in pressure vessel using anova
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Experimental and numerical study of defects in pressuresed cylindrical shells...
Abstract
In order to conduct a comprehensive study on the harmfulness of defects in the pressure vessels, and in order to propose simple rules to characterize the harmfulness of existing defects in pressurized installations. An experimental study based on the monitoring of deformations by strain gauges in the vicinity of defects. In parallel, during pressure testing, the evolution of defects is detected and followed by the acoustic emission method. The specific instrumentation has been designed and implemented. Mini-structures ( models) have therefore been carried out with positional defects and different orientation. These experimental results validated by a numerical model of finite elements.
Keywords: Pressure vessels, Cylindrical shells, Defect harmfulness, Circumferential and longitudinal Crack, Strain gauges, Acoustic emission, Stress Intensity Factor.
An Overview of Acoustic Pulse Reflectometry
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Iisrt siddharth prabhu (electrical)
This document describes a system called PipeGuard that aims to autonomously detect leaks in pipes. It summarizes the system's design and working principles. PipeGuard contains a carrier module that provides locomotion inside pipes and a detector module. The detector works by measuring changes in force on a rotating drum suspended by a gimbal mechanism when a membrane attached to the drum comes in contact with leak areas. These force measurements can identify leak locations based on the angle of contact. The system uses two microcontrollers, one for real-time leak sensing from force sensors and one for controlling the carrier's speed. It communicates wirelessly to a command center to report leak detections.
Analysis of Transformer Loadings and Failure Rate in Onitsha Electricity Dist...
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This document is a project report submitted for the degree of Bachelor of Technology in Civil Engineering. It discusses identifying risk zones along the GAIL pipeline in East Godavari district of Andhra Pradesh, India. The objectives are to use GIS tools to map the pipeline network and identify risk prone zones based on the diameter and location of potential holes in the pipeline. Methodologies for data acquisition, pre-processing in ERDAS and ArcGIS software, and analysis of results to determine buffer zones around holes of different diameters based on radiation levels are described. The results can help GAIL authorities identify high risk areas and take appropriate safety measures.
STUDY THE EFFECT OF METALLIC PARTICLE ON DIFFERENT SPACER IN A CO-AXIAL DUCT ...
This document studies the effect of metallic particles on the breakdown voltage in a coaxial duct with different spacer materials. Experiments were conducted with copper wire particles placed horizontally and vertically in a coaxial duct with spacers made of polypropylene, nylon, acrylic and teflon. The breakdown voltage was measured under AC, positive DC and negative DC voltages. The results showed that teflon and polypropylene had the highest breakdown voltages. Introducing metallic particles lowered the breakdown voltage, with horizontal placement having less effect than vertical placement. The conclusions determined that the number, position and material of conductors and spacers influence the breakdown voltage in coaxial geometries.
Orientation Effects of Stress Concentrators on the Material Deformation Beha...
Present investigation pertains to carry out to experimental work to generate data in order to
establish the mode of material deformation and fracture in AISI 316 stainless steel strips of 1.70mm thickness in
the presence of elliptical notches at the center of the specimen whose major axis were designed to incline to the
tensile axis at an angle of 0o
, 45o
and 90o
and the same happens to be the axis of rolling. An elliptical hole of
8.00mm (major axis) with 5.0mm (minor axis) were machined in each specimen so as to correspond to the above
angles of 0o
45o
and90o
and one specimen without any elliptical hole as a notch for comparative analysis of the experimental data. These flat specimens with and without stress concentrators were tested under tension using Hounsfield Tcnsomctcr and the changes in notch geometry have been recorded at various loadings. Further, the visual appearance of the cracks initiation have been continuously observed and recorded. The effect of stress ratio factors and the strain ratio parameters on the mode of fracture on material deformation in and around the stress concentrator has been thoroughly analyzed and it has been established that the crack initiation began either at the inner tips of the minor or the major axis of the elliptical stress concentrator, but, always perpendicular to the direction of loading irrespective of the rolling direction and the orientations of the stress concentrators. However, the changes in the rotation of the major and the minor axis of the elliptical stress concentrators were found to alter, and, this alteration in fact assisted in estimating the strains along the major as well as the minor axis of the stress concentrators. Relation between a plastic strain ratio with respect to the ratio between the major and the minor strains was observed to be of extremely complex nature. The overall observation in the present investigation has indicated that thin strips or sheet specimens containing a single or multiple or a combined type of stress concentrators will create a keen interest in the research approach of the investigators and make them aware of the seriousness of the presence of the stress concentrators and caution them to incorporate any possible design notifications in order to avoid any catastrophic failure (s).
F047041048
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
papers about flow pipe.pdf
This document discusses experiments carried out to study the effectiveness of using internal pipe measurements for leak detection in plastic pipes. Acoustic and pressure signals from simulated leaks of varying flow rates were measured using a hydrophone and pressure transducer inside a 4-inch plastic pipe. The results showed that both sensors could detect leaks as small as 2 liters per minute under low pipe flow rates. Increasing the ratio between pipe flow rate and leak flow rate diminished and lowered the frequency of the leak signals. Sensor location and direction relative to the leak were also found to impact the quality of the acquired signal.
Determination of Range of Splash of Testing Fluid during Hydro Testing of Kni...
There are certain trivial experimental findings which may not have a major significance but their execution is considered to be of such a nature as to complete the study in the specified area. Likewise in the field of hydro testing of valves and flow equipment, there is a basic requirement of operation of the same under influence of applied hydro pressure. This is required to determine the performance parameters like the thrust and the torque required to operate the equipment. While doing so, in addition to the qualitative requirements, an additional requirement of space has to be considered to ensure the surrounding area is not affected due to splashes of the testing fluid while under pressure. This paper shall consider such a case for hydro testing of a knife gate valve. At a given pressure, when the door or gate of the valve is initiated to open, there is an initial splash of testing fluid which ejects out of the orifice created due to the opening. The horizontal range of this splash shall be mathematically determined. An experimental finding shall then be presented to confirm the derived formulae. A conclusion shall be drawn thereafter dictating the percentage error and the employability of the derived formulae. Gourav Vivek Kulkarni "Determination of Range of Splash of Testing Fluid during Hydro Testing of Knife Gate Valve" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-6 , October 2020, URL: https://www.ijtsrd.com/papers/ijtsrd35747.pdf Paper Url: https://www.ijtsrd.com/engineering/mechanical-engineering/35747/determination-of-range-of-splash-of-testing-fluid-during-hydro-testing-of-knife-gate-valve/gourav-vivek-kulkarni
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Crack and Corrosion Monitoring of Pipelines Using Multi-Sensors
- 1. Abstract of Applied Sciences and Engineering, 2015, Vol.5 DOI: 10.18488/journal.1001/2015.5/1001.5 5th International Scientific Conference on Applied Sciences and Engineering 29-30 December, 2015 Flora Grand Hotel, Dubai, United Arab Emirates Conference Website: www.scihost.org 4 Paper ID: 35/15/ 5 th ISCASE Crack and Corrosion Monitoring of Pipelines Using Multi- Sensors Masoud Nouparast1 --- Solmaz Shakuri2 --- Ali Movaghar3 --- Abolghassem Zabihollah4 1,2,3,4 School of Science and Engineering, Sharif University of Technology, Int’l Campus, Iran, Kish Island Abstract The present work investigates the structural health monitoring of pipelines using multi sensors for early detection of cracks to prevent possible failures during operation. Presenting cracks in the pipe wall may significantly alter the stiffness of the pipes. Changing the flow in pipelines results in changing the pressure, and thus, the deformation of the pipe’ wall. Pipe’s wall deformation leads to changing the electrical voltage generated in PVDF sensors, which is used as an indicator for possible failure in the pipeline. Most of the available works in this field are based on the single sensing which may provides significant errors in the size and location of the cracks. In order to detect the size and location of the cracks and damage, one may needs several sensors mounted at different locations close to the defected region. In this paper, four PVDF sensors are mounted at the defected area of the pipelines to achieve an accurate estimation of the size and location of the damage. It is observed that using multi sensors may provides an efficient method to detect the damage and to predict the possible failure in the pipeline structures. Keywords: Pipelines, Multi-sensors, Signal processing, Crack detection